• [Misspelled as atratulus by Santschi, 1929d: 301.]
• Latreille, 1802a: 274 (q.); Spinola, 1851b: 47 (unknown forms); Spinola, 1853: 63 (m.); Kempf, 1951: 116 (q.m.); Wheeler & Wheeler, 1954b: 154 (l.)
• Combination in Cryptocerus: Latreille, 1803: 280; Fabricius, 1804: 418; Latreille, 1809: 132; Leach, 1815: 147.
• Combination in Cryptocerus (Cephalotes): Wheeler, 1916c: 12.
• Combination in Cephalotes: Latreille, 1802b: 358; Emery, 1914b: 39; Santschi, 1916e: 381; Santschi, 1920f: 148; Smith, 1949c: 19.
• Status as species: Linnaeus, 1767: 965; De Geer, 1773: 609; Fabricius, 1775: 395; Fabricius, 1782: 493; Retzius, 1783: 76; Gmelin, 1790: 2803; Christ, 1791: 516; Olivier, 1792: 500; Fabricius, 1793: 363; Latreille, 1802a: 272; Latreille, 1803: 280; Fabricius, 1804: 418; Gravenhorst, 1807: 287; Latreille, 1809: 132; Leach, 1815: 147; Latreille, 1817a: 526; Klug, 1824: 200; Lepeletier de Saint-Fargeau, 1835: 170 (redescription); Guérin-Méneville, 1844a: 426; Spinola, 1851b: 47; Spinola, 1853: 63; Smith, 1853: 215; Smith, 1858a: 187; Mayr, 1862: 757; Smith, 1862b: 35; Smith, 1862d: 408; Roger, 1862c: 291; Mayr, 1863a: 405; Roger, 1863b: 38; Mayr, 1865: 114; Emery, 1878a: ix (in list); Mayr, 1884: 37; Emery, 1890b: 68; Dalla Torre, 1893: 141; Emery, 1894f: 4; Forel, 1895b: 133; Forel, 1899b: 48; Forel, 1899j: 273; Forel, 1901m: 50; Wheeler, 1905c: 128; Emery, 1906c: 170; Forel, 1906d: 235; Forel, 1907h: 3; Wheeler, 1908a: 144; Forel, 1909a: 257, 266; Forel, 1912f: 199; Bruch, 1914: 218; Emery, 1914b: 39; Mann, 1916: 448; Wheeler, 1916c: 12; Wheeler, 1916f: 326; Crawley, 1916b: 371; Santschi, 1916e: 381; Luederwaldt, 1918: 40; Wheeler, 1918b: 26; Santschi, 1920f: 148; Forel, 1921b: 134; Wheeler, 1922e: 12; Wheeler, 1923a: 4; Emery, 1924f: 303; Wheeler, 1925a: 36; Borgmeier, 1927c: 114; Borgmeier, 1934: 103; Menozzi, 1935b: 197; Eidmann, 1936b: 81; Santschi, 1939f: 163; Wheeler, 1942: 207; Smith, 1949c: 19; Kempf, 1951: 114 (redescription); Kempf, 1958a: 10; Kempf, 1961b: 514; Kempf, 1970b: 335; Kempf, 1972b: 75; Zolessi et al., 1988: 4; Brandão, 1991: 337; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111 (redescription); Wild, 2007b: 31; Bezděčková et al., 2015: 115; Sandoval-Gómez & Sánchez-Restrepo, 2019: 904; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes atratus crassispina: Kempf, 1951: 115; Kempf, 1958a: 10; Kempf, 1972b: 75; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes decemspinosus: Oliveira et al., 2021: 19 (by implication).
• Senior synonym of Cephalotes dubitatus: Smith, 1858a: 188; Mayr, 1863a: 405; Roger, 1863b: 38; Mayr, 1865: 114; Dalla Torre, 1893: 141; Forel, 1899b: 48; Emery, 1924f: 304; Borgmeier, 1927c: 114; Kempf, 1951: 115; Kempf, 1972b: 75; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111.; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes atratus erectus: De Andrade & Baroni Urbani, 1999: 112; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes marginatus: Klug, 1824: 200; Smith, 1853: 215; Smith, 1858a: 188; Roger, 1862c: 291; Mayr, 1863a: 405; Roger, 1863b: 38; Mayr, 1865: 114; Dalla Torre, 1893: 141; Forel, 1899c: 48; Emery, 1924f: 304; Borgmeier, 1927c: 114; Kempf, 1972b: 75; Bolton, 1995b: 141; Oliveira et al., 2021: 19.
• Senior synonym of Cephalotes atratus nitidiventris: Kempf, 1951: 115; Kempf, 1972b: 75; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes atratus quadridens: Retzius, 1783: 76; Latreille, 1802a: 272; Fabricius, 1804: 419; Latreille, 1817a: 526; Klug, 1824: 200; Smith, 1853: 215; Smith, 1858a: 188; Mayr, 1863a: 405; Roger, 1863b: 38; Mayr, 1865: 114; Dalla Torre, 1893: 141; Forel, 1895b: 133; Forel, 1899b: 48; Wheeler, 1908a: 144; Emery, 1924f: 303; Borgmeier, 1927c: 114; Kempf, 1951: 115; Kempf, 1958a: 10; Kempf, 1972b: 75; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes atratus rufiventris: Kempf, 1951: 115; Kempf, 1958a: 10; Kempf, 1972b: 75; Bolton, 1995b: 140; De Andrade & Baroni Urbani, 1999: 111; Oliveira et al., 2021: 19 (in list).
• Senior synonym of Cephalotes decemspinosus spissus: Oliveira et al., 2021: 19 (by implication).
• Material of the unavailable name Cephalotes atratus quadridens dehnowi referred here by Kempf, 1951: 115; Kempf, 1972b: 75; Bolton, 1995b: 140.

Junior synonyms

• Cephalotes atratus crassispina Santschi, 1920
• Cephalotes atratus erectus Kempf, 1951
• Cephalotes atratus nitidiventris Santschi, 1920
• Cephalotes atratus quadridens (De Geer, 1773)
  Obsolete combination(s): Cephalotes quadridens, Formica quadridens
• Cephalotes atratus rufiventris (Emery, 1894)
  Obsolete combination(s): Cryptocerus atratus rufiventris
• Cephalotes decemspinosus Santschi, 1920
• Cephalotes decemspinosus spissus Santschi, 1929
• Cephalotes dubitatus (Smith, 1853)
  Obsolete combination(s): Cryptocerus dubitatus
• Cephalotes marginatus (Fabricius, 1804)
  Obsolete combination(s): Cryptocerus marginatus

Obsolete combinations

• Cryptocerus atratus
• Formica atrata

Citations

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